Title:
BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION FOR VEHICLE
Document Type and Number:
WIPO Patent Application WO/2011/151916
Kind Code:
A1
Abstract:
Provided is a belt-type continuously variable transmission for vehicles that allows for an increase in design freedom for a hydraulic pressure supply passage for supplying hydraulic pressure to the oil chambers of a hydraulic cylinder. A first hydraulic cylinder (48) is provided with: a first piston (66) that is provided so as to be incapable of movement in the direction of a shaft center (C1) and forms a first oil chamber (64) together with a movable sheave (54); and a second piston (70) that is provided so as to be capable of movement in the direction of the shaft center (C1) is disposed on the inner peripheral side of the first piston (66) so as to form the first oil chamber (64) together with the first piston (66) and to form a second oil chamber (68) together with the first wall (62a) of a cylinder member (62). The second piston (70) has an oil chamber communication hole (74) that links the first oil chamber (64) and the second oil chamber (68). Therefore, the hydraulic pressure supply passage for supplying hydraulic pressure to each oil chamber of the first hydraulic cylinder (48) may be provided as a single-path hydraulic pressure supply passage comprising a third oil path (84) and a fourth oil path (86) that are linked to at least the second oil chamber (68).
Inventors:
KIKUKAWA DAISUKE (JP)
Application Number:
PCT/JP2010/059471
Publication Date:
December 08, 2011
Filing Date:
June 03, 2010
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
KIKUKAWA DAISUKE (JP)
KIKUKAWA DAISUKE (JP)
International Classes:
F16H9/18
Foreign References:
| JPS6179057U | 1986-05-27 | |||
| JPH0483947A | 1992-03-17 | |||
| JPH0483948A | 1992-03-17 |
Attorney, Agent or Firm:
IKEDA HARUYUKI (JP)
Haruyuki Ikeda (JP)
Haruyuki Ikeda (JP)
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Claims: